Question

A medical unit has 18 patients.Eight have type O blood. Five have type A blood. Two have type AB blood. Three have type B blood. Write the fractions that describe the portions of the medical unit that have each blood type

Answer 1

the numerator is the amount of the blood type
the denominator is the total number

For example,

type O: 8/18
and so on

Answer 2

8/18 = 2/9 have Type O
5/18 have Type A

Take it from there.